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Preparation process for thermosensitive controlled-release material for marine antifouling agent

A marine antifouling agent and controlled-release material technology, applied in antifouling/underwater coatings, botanical equipment and methods, microsphere preparation, etc. Control the release rate of antifouling agent and other issues to achieve the effect of improving antifouling effect and utilization rate, improving utilization rate and high embedding efficiency

Active Publication Date: 2012-10-17
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve the above purpose, the release control technology of the present invention for the existing antifouling agent can only slow down the release rate, and cannot adjust and control the release rate of the antifouling agent according to the change in the amount of fouling organisms, which affects the effective utilization rate of the antifouling agent A kind of marine antifouling agent temperature-sensitive controlled release material is proposed, using chitosan as raw material, chitosan temperature-sensitive material as the outer membrane, microencapsulated antifouling agent as the core, and the antifouling agent with core-shell structure is prepared. Antifouling agent temperature-sensitive controlled-release material, which can regulate the release of antifouling agent with temperature changes, has good controlled-release performance, is environmentally friendly, and has potential application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: the preparation of chitosan-loaded antifouling agent microparticles

[0012] The present embodiment gets 200mg degree of deacetylation and is that the chitosan of 95% is dissolved in the acetic acid solution of 50mL0.1mol / L, adds the acetone solution 50ml of 8g Tween 80,4mg / ml antifouling agent paeonol, stirring speed is 1500rp, sonicate for 10 minutes, add co-solvent isopropanol 10mL, the solution finally becomes emulsified and not turbid; then add 100g sodium tripolyphosphate dropwise to the above solution to solidify the microspheres, stir for 30min, and filter out the solution , the residual solvent is washed with acetone and deionized water for the solid, and freeze-dried in a vacuum to obtain a product of solid chitosan-loaded antifouling agent microparticles.

Embodiment 2

[0013] Example 2: Preparation of marine antifouling agent temperature-sensitive controlled-release material

[0014] In this embodiment, 200 mg of chitosan with a deacetylation degree of 80% is dissolved in 9 mL of 0.1 mol / L acetic acid solution; 600 mg of β-glycerophosphate sodium is dissolved in 12 mL of distilled water, and the prepared β-glycerophosphate is stirred in an ice-water bath. - Sodium glycerophosphate solution is added dropwise in the chitosan solution, after continuing to stir for 30min, adjust the pH to 7.0 with a saturated solution of disodium hydrogen phosphate; Add 10mL of distilled water dropwise to the above solution after dispersion, and continue to stir for 30 minutes in an ice bath to obtain a chitosan temperature-sensitive gel embedded with antifouling agent particles. After refrigerated centrifugation and freeze-drying, a marine antifouling agent temperature-sensitive controlled release material is obtained. .

Embodiment 3

[0015] Embodiment 3: release experiment of antifouling agent with temperature

[0016] In this embodiment, 1g of acrylic resin is mixed with 0.4g of rosin, and 10mg of paeonol and xylene solution of temperature-sensitive chitosan containing antifouling agent particles containing an equivalent amount of paeonol are added respectively to make a coating, which is coated on a surface of 2cm× The surface of a 4cm slide glass was dried at room temperature and placed in 150ml of seawater at different temperatures for antifouling agent release experiments. Four different temperatures were taken at 15°C, 20°C, 25°C and 30°C, and the standard curve method was used to regularly (1 time / day) to analyze the release amount of antifouling agent, and at the same time test the release amount of antifouling agent in the process of gradient heating and cooling (from 15°C to 30°C and then to 15°C). The results show that the chitosan The antifouling agent microcapsules coated with sugar temperatur...

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PUM

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Abstract

The invention relates to a preparation process for a thermosensitive controlled-release material for a marine antifouling agent, which belongs to the field of marine antifouling technologies. The process comprises the following steps: dissolving chitosan in an HAc solution, adding tween 80 and acetone, carrying out high speed stirring and ultrasonic treatment, then adding isopropanol to form an oil / water dispersion system which is in an emulsified clear state, adding sodium tripolyphosphate for a cross-linking solidification reaction, carrying out filtration so as to remove liquor, flushing aresidual solvent with acetone and water, and carrying out refrigeration and vacuum drying so as to obtain microencapsulated particles; dissolving chitosan in the HAc solution again, dissolving sodiumbeta-glycerophosphate in water, adding a sodium beta-glycerophosphate solution into a chitosan solution under the conditions of ice water bath and stirring, continuing stirring, and adjusting the pH value of the solution to be 7.0; and dispersing the microencapsulated particles with water, then adding the dispersed particles into the chitosan solution, carrying out stirring, and then carrying outcentrifugation and drying so as to obtain the thermosensitive controlled-release material. The preparation process is simple and is convenient to control; and the prepared material has good quality, good controlled release performance, environment friendliness and a good application effect.

Description

Technical field: [0001] The invention relates to a preparation method of a temperature-sensitive controlled-release material for a marine antifouling agent, which can realize the effect of adjusting the release rate of the antifouling agent with temperature changes, improve the utilization rate of the antifouling agent, and prolong the antifouling period effect, belonging to marine antifouling technology field. Background technique: [0002] At present, marine engineering and ships mainly prevent marine biofouling by coating antifouling coatings. Marine antifouling coatings are mainly released and diffused to the surface of materials through marine antifouling agents, and interact with marine fouling organisms to kill or Drive away fouling organisms, thereby effectively preventing the adhesion of marine organisms on the surface of the material. However, since the antifouling agent cannot be effectively controlled during the release process, there is generally a burst releas...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N35/04C09D7/12C09D5/16B01J13/02
Inventor 许凤玲蔺存国郑纪勇
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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